try_match: Adding an inline documentation
try_match: Adding an inline documentation

When trying to debug a spec and an hw file it's always much boring
trying to remember what are the arguments orders while not reading the
code.

Instead of getting an exception, let's print a useful help message if
not the good amount of arguments are passed.

enovance/edeploy,enovance/edeploy,lebauce/edeploy,lebauce/edeploy,redhat-cip/edeploy,lebauce/edeploy,enovance/edeploy,redhat-cip/edeploy,lebauce/edeploy,redhat-cip/edeploy,enovance/edeploy,redhat-cip/edeploy